JP2008236519A - Wireless transceiver, wireless transmitter, wireless receiver, and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless transceiver, wireless transmitter, wireless receiver, and control method in which phase noise is suppressed even in a configuration where synthesizers of two systems of system-0 and system-1 generating the same frequency can not be sufficiently isolated. <P>SOLUTION: Since phase control is performed by controlling frequency division timing of a reference frequency oscillation signal, even in a case where a VCO output of a synthesizer section in one transmission unit sneaks into a synthesizer section in another transmission unit, a phase comparator is not affected as jitter and a local oscillation signal can be generated in which deterioration of phase noise does not occur and even in a configuration where synthesizers of two systems of system-0 and a system-1 generating the same frequency can not be sufficiently isolated, phase noise can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless transceiver, a wireless transmitter, a wireless receiver, and a control method.

In recent years, wireless transceivers including mobile phones and low-power transceivers, wireless transmitters, and wireless receivers including stereo components have been actively developed.
FIG. 11 is an example of a block diagram of a conventional radio receiver.
The radio receiver 1 shown in the figure is composed of two receivers, a 0-system receiver 2 and a 1-system receiver 12, and each receiver receives a 0-system desired wave. 3 and 0 system synthesizer section 5, 1 system receiving section 13 and 1 system synthesizer section 15 for receiving 1 system desired wave are provided. The 0-system receiving unit 3 uses a local oscillation signal from the 0-system synthesizer unit 5 to convert a desired wave frequency to an intermediate frequency. 0-system MIX 4, and the 1-system receiving unit 13 uses a local oscillation from the 1-system synthesizer unit 15. 1 system MIX14 which converts a desired wave frequency into an intermediate frequency using a signal, and 0 system synthesizer section 5 outputs 0 system VCO 6, 0 system loop filter 7 and 0 system PLL in order to output a 0 system local oscillation frequency. It consists of IC8.

  The 1-system synthesizer unit 15 includes a 1-system VCO 16, a 1-system loop filter 17, and a 1-system PLL IC 18 for outputting a 1-system local oscillation frequency.

  The radio receiver 1 shown in the figure is a radio transmitter / receiver having a one-carrier reception diversity configuration that generates the same frequency between two synthesizers of a 0-system synthesizer unit and a 1-system synthesizer unit.

In addition, in order to stabilize the sensitivity at the time of movement, the radio receiver controls the phase difference between the main received signal and the sub received signal and outputs a synthesized signal (for example, see Patent Document 1). Is mentioned. In addition, there is a digital cellular phone in which two systems of local oscillators and synthesizer circuits are provided as radio transceivers, and frequency conversion is performed by one of the local oscillation signals. Furthermore, in addition to requiring sensitivity, stability, and selectivity (in the case of radio), wireless receivers may require a high S / N ratio. For this reason, a technique for detecting noise is required (for example, see Patent Document 3).
Japanese Patent Publication No. 6-44732 JP-A-6-164491 Japanese Patent Laying-Open No. 2005-210297

  However, when the above-described prior art is used, a 0-system that generates the same frequency of a radio transceiver with a one-carrier reception diversity configuration in a W-CDMA (Wideband Code Division Multiple Access) transceiver When the isolation between two synthesizers in one system is not sufficient, phase noise is generated due to interference caused by local transmission signals.

  Therefore, an object of the present invention is to provide a wireless transceiver, a wireless transmitter, and a wireless receiver that suppress phase noise even in a configuration in which isolation between two synthesizers of 0 and 1 systems that generate the same frequency is not sufficient. And providing a control method.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a transmission-side 0-system synthesizer section that supplies a local oscillation signal to a modulation circuit of a 0-system transmission section in a radio transmitter / receiver having a diversity configuration, A transmission-side 1-system synthesizer section for supplying a local oscillation signal to the modulation circuit of the system-transmitting section; a receiving-side 0-system synthesizer section for supplying a local oscillation signal to the mixer circuit of the 0-system reception section in the wireless transceiver; A wireless transceiver including a reception-side 1-system synthesizer section that supplies a local oscillation signal to a mixer circuit of a 1-system reception section in a transceiver, and a transmission side for supplying a reference frequency signal to a transmitter of each system A reference signal oscillating unit, a transmitting side switch circuit for turning on / off a 0 system reference frequency signal from the transmitting side reference signal oscillating unit for the 0 system transmitter, a 0 system reference signal and a 1 system reference signal as comparison frequencies The 0-side comparison frequency signal and the 1-system comparison frequency signal that have been frequency-divided into the transmission side 0/1 phase comparison unit for comparison processing, and the reception-side reference signal for supplying the reference frequency signal to the receiver of each system An oscillation unit, a transmission-side switch circuit for turning on and off the 0-system reference frequency signal from the reception-side reference signal oscillation unit for the 0-system receiver, and the 0-system reference signal and the 1-system reference signal are divided into comparison frequencies. And a receiving-side 0/1 phase comparison unit for inputting a 0-system comparison frequency signal and a 1-system comparison frequency signal and performing comparison processing.

  According to the first aspect of the present invention, the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration transmission unit, so that the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer section of the other transmitter section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to a second aspect of the present invention, in the first aspect of the invention, the transmission side 0-system synthesizer section divides a signal from the transmission side switch circuit and an R divider that divides the signal from the transmission side switch circuit. An N divider, a phase comparator for comparing the phases of the signals from the N divider and the R divider, and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO The transmission side 1-system synthesizer unit includes an R divider that divides a signal from the reference frequency oscillating unit, an N divider that divides a signal from a VCO, the N divider, and A phase comparator that compares the phase of the signal from the R divider, and a loop filter that filters the signal from the phase comparator and inputs the filtered signal to the VCO, and the receiving-side 0-system synthesizer unit includes: An R divider for dividing the signal from the receiving side switch circuit; An N divider that divides the signal from the CO, a phase comparator that compares the phases of the signals from the N divider and the R divider, and a signal that is filtered from the phase comparator A loop filter that inputs to a VCO, wherein the receiving side 1-system synthesizer section divides a signal from the reference frequency oscillating section, and an N divider that divides a signal from the VCO; A phase comparator for comparing the phases of the signals from the N frequency divider and the R frequency divider, and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO. And

  According to the second aspect of the present invention, the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration transmission unit, so that the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer section of the other transmitter section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to a third aspect of the present invention, there is provided a transmission-side 0-system synthesizer section for supplying a local oscillation signal to a modulation circuit of a 0-system transmission section in a diversity-configured radio transmitter, and a 1-system transmission section modulation circuit in the radio transmitter. A wireless transmitter including a transmission-side 1-system synthesizer unit that supplies a local oscillation signal, a transmission-side reference signal oscillation unit for supplying a reference frequency signal to each system transmitter, and a 0-system transmitter On the other hand, a transmission-side switch circuit for turning on / off the 0-system reference frequency signal from the transmission-side reference signal oscillating unit, and a 0-system comparison frequency signal and a 1-system comparison obtained by dividing the 0-system reference signal and the 1-system reference signal into comparison frequencies. A transmission-side 0/1 phase comparison unit that inputs a frequency signal and performs comparison processing.

  According to the third aspect of the present invention, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one of the transmission units is Even when the synthesizer section of the other transmitter section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the transmission side 0-system synthesizer section divides a signal from the transmission side switch circuit and a signal from the VCO. An N divider, a phase comparator for comparing the phases of the signals from the N divider and the R divider, and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO The transmission side 1-system synthesizer unit includes an R divider that divides a signal from the reference frequency oscillating unit, an N divider that divides a signal from a VCO, the N divider, and A phase comparator that compares the phase of the signal from the R divider, and a loop filter that filters the signal from the phase comparator and inputs the filtered signal to the VCO.

  According to the fourth aspect of the present invention, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one of the transmission units is Even when the synthesizer section of the other transmitter section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to a fifth aspect of the present invention, there is provided a receiving-side 0-system synthesizer section for supplying a local oscillation signal to a mixer circuit of a 0-system receiving section in a diversity-configured wireless receiver, and a 1-system receiving section mixer circuit in the wireless receiver. A wireless receiver including a reception-side 1-system synthesizer unit that supplies a local oscillation signal, a reception-side reference signal oscillation unit for supplying a reference frequency signal to each system receiver, and a 0-system receiver On the other hand, a receiving-side switch circuit for turning on and off the 0-system reference frequency signal from the transmitting-side reference signal oscillating unit, and a 0-system comparison frequency signal and a 1-system comparison obtained by dividing the 0-system reference signal and the 1-system reference signal into comparison frequencies And a receiving-side 0/1 phase comparison unit that receives a frequency signal and performs comparison processing.

  According to the fifth aspect of the present invention, the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, so that the VCO output of the synthesizer unit in one of the reception units is Even when the synthesizer section of the other receiving section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the receiving-side 0-system synthesizer section divides a signal from the receiving-side switch circuit and a signal from the VCO. An N divider, a phase comparator for comparing the phases of the signals from the N divider and the R divider, and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO The receiving-side 1-system synthesizer section includes an R divider that divides a signal from the reference frequency oscillating section, an N divider that divides a signal from a VCO, the N divider, and A phase comparator that compares the phase of the signal from the R divider, and a loop filter that filters the signal from the phase comparator and inputs the filtered signal to the VCO.

  According to the sixth aspect of the present invention, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one of the reception units is Even when the synthesizer section of the other receiving section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  The invention according to claim 7 supplies a local oscillation signal to a modulation circuit of a 0-system transmission unit in a radio transceiver having a diversity configuration, and supplies a local oscillation signal to a modulation circuit of a 1-system transmission unit in the radio transceiver, A wireless transmission / reception method for supplying a local oscillation signal to a mixer circuit of a 0-system receiving unit in the wireless transceiver and supplying a local oscillation signal to a mixer circuit of a 1-system receiving unit in the wireless transceiver, wherein each system transmits The reference frequency signal is supplied to the transmitter, the 0-system reference frequency signal from the transmission-side reference signal oscillation unit is turned on / off for the 0-system transmitter, and the 0-system reference signal and the 1-system reference signal are divided into comparison frequencies. A 0-system comparison frequency signal and a 1-system comparison frequency signal are input, compared, a reference frequency signal is supplied to the receiver of each system, and a 0-system from the reception-side reference signal oscillation unit is supplied to the 0-system receiver. Turns on / off the reference frequency signal, 0 The reference signal and the 1-system reference signal type 0 system comparison frequency signal by dividing the comparison frequency and the 1-system comparison frequency signal, and comparing processing.

  According to the seventh aspect of the present invention, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one of the transmission units is Even when the synthesizer section of the other transmitter section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to an eighth aspect of the present invention, a local oscillation signal is supplied to a modulation circuit of a 0-system transmission unit in a diversity-configured radio transmitter, and a local oscillation signal is supplied to a modulation circuit of a 1-system transmission unit in the radio transmitter. In this transmission method, a reference frequency signal is supplied to a transmitter of each system, a 0-system reference frequency signal from the transmission-side reference signal oscillation unit is turned on / off to the 0-system transmitter, and a 0-system reference signal and 1 A 0-system comparison frequency signal and a 1-system comparison frequency signal obtained by dividing the system reference signal to the comparison frequency are input and compared.

  According to the eighth aspect of the present invention, the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, so that the VCO output of the synthesizer unit in one of the transmission units is Even when the synthesizer section of the other transmitter section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to a ninth aspect of the present invention, a local oscillation signal is supplied to a mixer circuit of a 0-system receiving unit in a diversity-configured radio receiver, and a local oscillation signal is supplied to a mixer circuit of a 1-system receiving unit in the radio receiver. In this receiving method, a reference frequency signal is supplied to a receiver of each system, a 0-system reference frequency signal from the transmission-side reference signal oscillating unit is turned on / off for the 0-system receiver, A 0-system comparison frequency signal and a 1-system comparison frequency signal obtained by dividing the system reference signal to the comparison frequency are input and compared.

  According to the ninth aspect of the present invention, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one of the reception units is Even when the synthesizer section of the other receiving section wraps around, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  According to the present invention, the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration transmission unit, so that the VCO output of the synthesizer unit in one transmission unit is transmitted to the other transmission unit. Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  One embodiment of a wireless transceiver according to the present invention includes a transmission-side 0-system synthesizer section that supplies a local oscillation signal to a modulation circuit of a 0-system transmission section in a diversity-configured wireless transceiver, and a 1-system transmission in the wireless transceiver. A transmission-side 1-system synthesizer section that supplies a local oscillation signal to the modulation circuit of the receiver, a reception-side 0-system synthesizer section that supplies a local oscillation signal to the mixer circuit of the 0-system reception section in the wireless transceiver, and a 1 in the wireless transceiver A transmission / reception reference signal oscillating unit for supplying a reference frequency signal to a transmitter of each system, comprising: a reception side 1 synthesizer unit for supplying a local oscillation signal to a mixer circuit of a system reception unit A transmission-side switch circuit that turns on / off the 0-system reference frequency signal from the transmission-side reference signal oscillator for the 0-system transmitter, and the 0-system ratio obtained by dividing the 0-system reference signal and the 1-system reference signal into the comparison frequency A transmission-side 0/1 phase comparison unit that inputs a frequency signal and a 1-system comparison frequency signal and performs comparison processing, a reception-side reference signal oscillation unit for supplying a reference frequency signal to each system receiver, and a 0-system reception A transmitter-side switch circuit for turning on and off the 0-system reference frequency signal from the reception-side reference signal oscillating unit, and a 0-system comparison frequency signal and a 1-system obtained by dividing the 0-system reference signal and the 1-system reference signal into the comparison frequency. And a receiving side 0/1 phase comparison unit for inputting a comparison frequency signal and performing comparison processing.

Here, the type of the modulation circuit may be any of an amplitude modulation circuit, a frequency modulation circuit, and a pulse modulation circuit.
For example, an analog switch is used as the switch circuit. The loop filter may be either a lag type filter using a resistor and a capacitor or a lag / lead type filter as long as it is a filter that cuts off AC components.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  Here, VCO is an abbreviation for Voltage Controlled Oscillator, and is an oscillator that controls the oscillation frequency with a voltage (control voltage).

In another embodiment of the radio transceiver according to the present invention, in addition to the above-described configuration, the transmission side 0-system synthesizer unit divides the signal from the transmission side switch circuit and the signal from the VCO. An N frequency divider for frequency division, a phase comparator for comparing the phases of signals from the N frequency divider and the R frequency divider, and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO. The transmission side 1-system synthesizer section includes an R divider that divides the signal from the reference frequency oscillating section, an N divider that divides the signal from the VCO, an N divider, and an R divider. A phase comparator that compares the phase of the signal of the signal and a loop filter that filters the signal from the phase comparator and inputs it to the VCO, and the receiving side 0-system synthesizer divides the signal from the receiving side switch circuit An R divider that divides, and an N divider that divides the signal from the VCO; A phase comparator that compares the phase of the signal from the frequency divider and the R frequency divider, and a loop filter that filters the signal from the phase comparator and inputs the signal to the VCO. R divider for dividing the signal from the frequency oscillating unit, N divider for dividing the signal from the VCO, and phase comparator for comparing the phases of the signals from the N divider and the R divider And a loop filter for filtering the signal from the phase comparator and inputting it to the VCO.
Here, counters are used for the N divider and the R divider.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  One embodiment of a wireless transmitter according to the present invention includes a transmission-side 0-system synthesizer unit that supplies a local oscillation signal to a modulation circuit of a 0-system transmission unit in a diversity-configured wireless transmitter, and a 1-system transmission in the wireless transmitter. A transmission-side reference signal oscillating unit for supplying a reference frequency signal to a transmitter of each system, a wireless transmitter including a transmission-side 1-system synthesizer unit that supplies a local oscillation signal to a modulation circuit of a unit; Transmission-side switch circuit for turning on / off the 0-system reference frequency signal from the transmission-side reference signal oscillator for the 0-system transmitter, and the 0-system comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into the comparison frequency And a transmission-side 0/1 phase comparison unit that inputs a 1-system comparison frequency signal and performs comparison processing.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  In another embodiment of the wireless transmitter according to the present invention, in the above configuration, the transmission side 0-system synthesizer unit divides the signal from the transmission side switch circuit by dividing the signal from the RCO and the VCO. An N divider that circulates, a phase comparator that compares the phases of the signals from the N divider and the R divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO; The transmission-side 1-system synthesizer section includes an R divider that divides the signal from the reference frequency oscillating section, an N divider that divides the signal from the VCO, an N divider, and an R divider. A phase comparator for comparing the phases of the signals and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO are provided.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  One embodiment of a wireless receiver according to the present invention includes a receiving-side 0-system synthesizer section that supplies a local oscillation signal to a mixer circuit of a 0-system receiving section in a diversity-configured wireless receiver, and a 1-system reception in the wireless receiver. A receiver 1 system synthesizer unit for supplying a local oscillation signal to the mixer circuit of the unit, a receiver side reference signal oscillator unit for supplying a reference frequency signal to each system receiver, A receiving-side switch circuit for turning on / off a 0-system reference frequency signal from a transmitting-side reference signal oscillator for a 0-system receiver, and a 0-system comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into comparison frequencies. And a receiving-side 0/1 phase comparison unit that inputs a 1-system comparison frequency signal and performs a comparison process.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration reception unit, the VCO output of the synthesizer unit in one reception unit is the reception of the other Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  In another embodiment of the wireless receiver according to the present invention, in the above configuration, the receiving side 0-system synthesizer section divides the signal from the receiving side switch circuit and the R divider and the VCO. An N divider that circulates, a phase comparator that compares the phases of the signals from the N divider and the R divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO; The receiving side 1-system synthesizer section includes an R divider that divides the signal from the reference frequency oscillating section, an N divider that divides the signal from the VCO, and an N divider and an R divider. A phase comparator for comparing the phases of the signals and a loop filter for filtering the signal from the phase comparator and inputting it to the VCO are provided.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration reception unit, the VCO output of the synthesizer unit in one reception unit is the reception of the other Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of phase noise. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  One embodiment of a method for controlling a radio transceiver according to the present invention supplies a local oscillation signal to a modulation circuit of a 0-system transmitter in a radio transceiver having a diversity configuration, and a modulation circuit of a 1-system transmitter in the radio transceiver Control of a wireless transceiver that supplies a local oscillation signal to a mixer circuit of a 0-system receiver in a wireless transceiver and supplies a local oscillation signal to a mixer circuit of a 1-system receiver in the wireless transceiver A reference frequency signal is supplied to a transmitter of each system, a 0-system reference frequency signal from a transmission-side reference signal oscillation unit is turned on / off to a 0-system transmitter, and a 0-system reference signal and a 1-system reference Inputs 0-system comparison frequency signal and 1-system comparison frequency signal obtained by dividing the signal to the comparison frequency, compares them, supplies the reference frequency signal to the receiver of each system, and receives the reference on the receiving side for the 0-system receiver System 0 reference frequency from signal oscillator It turned on and off signals, enter the 0-system reference signal and the 0-system comparison frequency signal and the 1-system comparison frequency signal by dividing the comparison frequency 1 system reference signal, and comparing processing.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. Further, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one receiver is the synthesizer unit of the other receiver Even when the signal goes around, the phase comparator can produce a local oscillation signal that is not affected by jitter and does not cause phase noise degradation. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  One embodiment of a method for controlling a radio transmitter according to the present invention supplies a local oscillation signal to a modulation circuit of a 0-system transmitter in a diversity-configured radio transmitter, and modulates a 1-system transmitter in the radio transmitter A wireless transmission method for supplying a local oscillation signal to a circuit, wherein a reference frequency signal is supplied to a transmitter of each system, and a 0-system reference frequency signal from the transmission-side reference signal oscillation unit is supplied to a 0-system transmitter. It is turned on and off, and a 0-system comparison frequency signal and a 1-system comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into comparison frequencies are input and compared.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration, the VCO output of the synthesizer unit in one transmission unit is Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  One embodiment of a control method for a wireless receiver according to the present invention supplies a local oscillation signal to a mixer circuit of a 0-system receiver in a diversity-configured wireless receiver, and a mixer circuit of a 1-system receiver in the wireless receiver Is a wireless reception method for supplying a local oscillation signal to the receiver of each system, supplying a reference frequency signal to the receiver of each system, and turning on / off the 0 system reference frequency signal from the transmission side reference signal oscillator to the 0 system receiver A 0-system comparison frequency signal and a 1-system comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into comparison frequencies are input and compared.

  According to the above configuration, since the phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal in the synthesizer unit of the diversity configuration reception unit, the VCO output of the synthesizer unit in one reception unit is the reception of the other Even when the synthesizer part of the signal sneaks into the synthesizer part, it is possible to generate a local oscillation signal that does not affect the phase comparator and does not cause deterioration of the phase noise. As a result, phase noise can be suppressed even in a configuration in which the isolation between the two synthesizers of the 0-system and the 1-system that generate the same frequency is not sufficient.

  A wireless transceiver, a wireless transmitter, a wireless receiver, a wireless transmission / reception method, a wireless transmission method, and a wireless reception method according to the present invention are one-carrier reception diversity wireless transceivers in a W-CDMA transceiver. This relates to a synthesizer unit that generates a local oscillation signal to be supplied to a mixer circuit in a transmission unit and a reception unit. Even in a configuration where the isolation between two synthesizers of the 0 system and the 1 system that generate the same frequency is not sufficient. Therefore, it is possible to avoid the interference due to the local transmission signals of each other and suppress the deterioration of the phase noise.

  The above-described embodiment shows an example of a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention. is there.

[Description of Configuration of Example]
FIG. 1 is an example of a block diagram of a diversity receiver implemented in a radio base station (not shown) for receiving a WCDMA radio signal, which is an embodiment of the radio receiver according to the present invention.
The configuration of the wireless receiver of this embodiment will be described with reference to FIG. Note that the baseband portion is omitted for simplicity of explanation.
The diversity receiver 1 as a radio receiver is composed of two receivers, a 0-system receiver 2 and a 1-system receiver 12, in order to obtain diversity gain. A 0-system receiving unit 3 and a 0-system synthesizer unit 5 that receive a desired wave, and a 1-system receiving unit 13 and a 1-system synthesizer unit 15 that receive a 1-system desired wave are provided.

  The 0-system receiving unit 3 uses a local oscillation signal from the 0-system synthesizer unit 5 to convert a desired wave frequency to an intermediate frequency. 0-system MIX 4, and the 1-system receiving unit 13 uses a local oscillation from the 1-system synthesizer unit 15. 1 system MIX14 which converts a desired wave frequency into an intermediate frequency using a signal, and 0 system synthesizer section 5 outputs 0 system VCO 6, 0 system loop filter 7 and 0 system PLL in order to output a 0 system local oscillation frequency. The 1-system synthesizer unit 15 includes a 1-system VCO 16, a 1-system loop filter 17, and a 1-system PLL IC 18 in order to output a 1-system local oscillation frequency.

  Further, the diversity receiver 1 includes a reference frequency signal oscillating unit 19 for supplying a reference frequency signal to each system receiver, and a 0 system reference frequency signal S6 from the reference frequency signal oscillating unit 19 for the 0 system receiver 2. A 0-system comparison frequency signal S5 obtained by frequency-dividing the 0-system reference frequency signal S6 and the 1-system reference frequency signal S16 into the comparison frequency inside the 0-system PLL IC8 and the 1-system PLL IC18. A 0/1 phase comparison unit 10 that receives the 1-system comparison frequency signal S15 and performs comparison processing is provided.

FIG. 2 is an example of a configuration diagram of a synthesizer unit used in the wireless receiver according to the present invention.
Further, as shown in FIG. 2, the 0-system PLL IC 8 of the 0-system synthesizer unit 5 includes a 0-system N frequency divider 31, a 0-system phase comparator 32, and a 0-system R frequency divider 33. Similarly, the 1-system PLL IC 18 of the unit 15 includes a 1-system N frequency divider 41, a 1-system phase comparator 42, and a 1-system R frequency divider 43.

[Description of Operation of Example]
The operation of the diversity receiver 1 in this embodiment will be described with reference to FIGS.
FIG. 3 is a diagram showing a phase difference of each PLL output clock at the time of interference in the radio receiver shown in FIG. 1, and FIG. 4 is a diagram illustrating how the switch circuit is operated once at the time of interference in the radio receiver shown in FIG. FIG. 5 is a diagram showing the phase difference of each PLL output clock when there is no interference in the radio receiver shown in FIG. 1.
In FIG. 5, when the difference is small, the desired waveform is mixed with the undesired waveform and jitter occurs. When the difference is large, the level of the desired pulse is larger than the undesired pulse, so the undesired pulse does not matter.

  The 0-system receiving unit 3 of the diversity receiver 1 down-converts the desired wave received by the 0-system antenna 20 by using the 0-system local oscillation signal S1 of the 0-system synthesizer unit 5 by the 0-system MIX4. Yes. The other 1-system receiving unit 13 down-converts the desired wave received by the 1-system antenna 21 using the 1-system local oscillation signal S11 of the 1-system synthesizer unit 15 by the 1-system MIX 14.

  Since this receiver has a diversity configuration, the 0-system local oscillation signal S1 generated by the 0-system synthesizer unit 5 and the 1-system local oscillation signal S11 generated by the 1-system synthesizer unit 15 have the same frequency. In addition, since the 0 system synthesizer unit 5 of the 0 system receiver 2 and the 1 system synthesizer unit 15 of the 1 system receiver 12 use the same reference frequency signal oscillating unit 19, signal supply to each PLL IC is transmitted. The configuration is such that the track is branched and used.

  The 0-system PLL IC 8 of the 0-system synthesizer unit 5 divides the 0-system N frequency dividing signal S4 obtained by frequency-dividing the output of the 0-system VCO 6 by the 0-system N frequency divider 31 and the R frequency divider 33 to divide the reference transmission signal. The 0 system comparison frequency signal S5 is subjected to phase comparison by the 0 system phase comparator 32. The 0-system phase comparator 32 outputs the compared phase difference as a pulse signal, so that the pulse component of this signal is converted into a 0-system VCO control voltage signal S3 by the 0-system loop filter 7 and fed back to the 0-system VCO 6 Apply control. Then, the output of the 0-system VCO 6 is locked as necessary so that the output is lower when the frequency is higher than the desired frequency and higher when the frequency is lower than the desired frequency, and the 0-system local oscillation signal S1 is output. Similarly, the 1-system synthesizer unit 15 also controls the 1-system VCO 16 and outputs a 1-system local oscillation signal S11 locked to a desired frequency.

[When the 0-system local oscillation signal S1 does not interfere with the 1-system local oscillation signal S11]
First, a case where the 0-system local oscillation signal S1 of the 0-system synthesizer unit 5 does not interfere with the 1-system local oscillation signal S11 of the 1-system synthesizer unit 15 will be described.
The 0-system PLL IC 8 compares the output of the 0-system R frequency divider 33 with the output of the 1-system R frequency divider 43 in the 0/1 phase comparison unit 10. The 0/1 phase comparison unit 10 is supplied with a clock from the reference frequency signal oscillation unit 19 to measure at which timing the pulse of the 0-system R frequency divider 33 appears. Similarly, the pulse timing of the 1-system R frequency divider 43 is also measured, and a time difference in timing is detected as a phase difference.

  If the phase difference is within 180 ° ± 90 °, it is determined that there is no interference because there is a sufficient phase difference. Therefore, even if the output of the 0-system VCO 6 travels through the transmission line for obtaining the reference frequency signal from the reference frequency signal oscillating unit 19 and wraps around the 1-system synthesizer unit 15 as the 0-system VCO leak signal S9, The waveform quality of the 1-system local oscillation signal S11 is not affected and the reception quality of the 1-system receiver 12 is not affected. Conversely, even if the output of the 1-system VCO 16 goes around the 0-system synthesizer unit 5, the output of the 0-system VCO 6 is not affected, and the reception quality of the 0-system receiver 2 is maintained.

[When the 0-system local oscillation signal S1 interferes with the 1-system local oscillation signal S11]
Next, a case where the 0-system local oscillation signal S1 of the 0-system synthesizer unit 5 interferes with the 1-system local oscillation signal S11 of the 1-system synthesizer unit 15 will be described.
The 0-system PLL IC 8 compares the output of the 0-system R frequency divider 33 with the output of the 1-system R frequency divider 43 in the 0/1 phase comparison unit 10. The 0/1 phase comparison unit 10 receives a clock from the reference frequency signal oscillation unit 19 to measure at which timing the pulse of the 0-system R frequency divider 33 appears. Similarly, the pulse timing of the 1-system R frequency divider 43 is also measured, and the phase difference is detected based on the timing difference.
Here, as shown in FIG. 3, if the phase difference is 90 ° or less, it is determined that the phase difference is not sufficient and interference occurs. Therefore, as shown in FIG. 4, in order to change the frequency division timing of the 0-system R frequency divider 33, the 0/1 phase comparison unit 10 causes the switch circuit 9 to change the clock timing from the reference frequency signal oscillation unit 19. Control to turn off the switch.
Since the reference frequency signal oscillating unit 19 supplied to the 0-system R divider 33 is shifted by one clock, the division timing is shifted by one clock, and the 0-system comparison frequency which is the divided output of the 0-system R divider 33 The phase of the signal S5 shifts and the phase changes. Then, until the phase difference between the 0-system R frequency divider 33 and the 1-system R frequency divider 43 is sufficiently secured to 180 °, the 0/1 phase comparison unit 10 performs the phase comparison operation of the R frequency period, the switch The phase control of the 0-system comparison frequency signal S5, which is the frequency-divided output of the 0-system R frequency divider 33, is continued by turning on and off the circuit 9. As a result, if the phase difference is secured up to 180 °, the 0-system VCO leak signal S9, which is the output of the 0-system VCO 6, can be reliably transmitted through the transmission line for receiving the reference frequency signal to the 1-system PLL IC 18. The output of the 1-system VCO 16 is not affected, the waveform quality of the 1-system local oscillation signal S11 is maintained, and the reception quality of the 1-system receiver 12 is not affected. Conversely, even if the output of the 1-system VCO 16 goes around the 0-system PLL IC 8, the output of the 0-system VCO 6 is not affected, and the reception quality of the 0-system receiver 12 is maintained.

  Here, since the relative permittivity εr = 4.7 and the relative permeability = 1.0 of the Pr plate (printed wiring board) on which each circuit such as a PLL IC is formed, the wavelength shortening rate ρ = 1 / √ (εr · μs) ≈0.5, but the length of the transmission line from the reference frequency signal input terminal of the 0-system PLL IC 8 to the reference frequency signal input terminal of the 1-system PLL IC 18 is the frequency of the VCO. The line length is adjusted to the wavelength multiplied by the wavelength shortening rate, the phase of the 0 system VCO 6 at the 0 system N frequency divider 31 and the 1 system of the 0 system VCO leak signal S9 leaking to the 1 system. It is assumed that the timing with the phase in the N frequency divider 41 is the same.

[Explanation of effects]
PLL ICs are becoming smaller and module types with built-in VCOs are emerging. When this type of PLL IC is used, there is a problem that it is difficult to ensure isolation between the internal VCO section and the PLL section because of its small size, and the phenomenon that the VCO output leaks from the reference oscillation signal input terminal of the PLL IC cannot be avoided.

  When there are a plurality of PLLs in one receiver and each generates a local oscillation signal, the reference frequency oscillation signal supplied to each PLL generally uses the same transmission source, and the embodiments of the present invention similarly. The same reference frequency signal from the reference frequency signal oscillating unit 19 is supplied to the 0-system synthesizer unit 5 and the 1-system synthesizer unit 15. This reference frequency signal has the simplest configuration in which the transmission line is branched and supplied as in this embodiment. In this case, the output of the 0-system VCO 6 is output to the 1-system synthesizer unit 15. Sneaks into the 0 system synthesizer section 5 without being attenuated, and the signal enters the other PLL IC.

The problem here is that in a diversity receiver, the local oscillation signals generated by the synthesizer sections of each system have the same frequency. Depending on the phase of the VCO output that wraps around, the synthesizer of the interfered system is affected as jitter. This deteriorates the phase noise of the local oscillation signal to be output. Even if the output timings of the 0-system data S3 and the 1-system data S13 are managed and the counter setting timings of the 0-system PLL IC 8 and the 1-system PLL IC 18 are kept constant, the counter start operation inside the PLL IC varies. For this reason, it is difficult to control the phase difference of the VCO output.
In the present invention, phase control is performed by controlling the frequency division timing of the reference frequency oscillation signal, and it is possible to avoid phase noise degradation due to interference between the VCO outputs.

This will be described in detail with reference to FIGS.
6 is an operation diagram of the phase comparator at the time of interference in the radio receiver shown in FIG. 1, and FIG. 7 is an operation diagram of the phase comparator at the time of non-interference in the radio receiver shown in FIG. . 8 is a diagram showing a spectrum waveform at the time of interference in the radio receiver shown in FIG. 1, and FIG. 9 is a diagram showing a spectrum waveform at the time of non-interference in the radio receiver shown in FIG. 8 and 9, the horizontal axis indicates the frequency, and the vertical axis indicates the signal intensity.
If the interference system is the 0-system synthesizer unit 5 and the interfered system is the 1-system synthesizer unit 15, the output of the 0-system VCO 6 is the 0-system VCO leak signal S9 at the reference frequency oscillation signal input terminal of the 0-system PLL IC 8 as described above. appear. The 0-system VCO leak signal S9 is transmitted through the transmission line and enters the 1-system PLL IC 18, and is divided by the 1-system N frequency divider 41 as shown in FIG.

  At this time, the output signal obtained by dividing the above-described 0-system VCO leak signal S9 is in a state where the phase difference is close to 0 °, that is, each original VCO, even when the level is lower than that of the 1-system N-divided signal S14. In this state, when the phase comparison is performed by the phase comparator 42, the 0-system VCO leak signal S9 appears as jitter of the output S18 of the 1-system VCO 16. When the 1-system VCO control voltage signal S13 is output in this state and the 1-system VCO 16 is controlled, the 1-system local oscillation signal S11 has a waveform that is modulated as shown in FIG.

  If the phase difference between the 0-system N-divided signal S4 and the 1-system N-divided signal S14 is large and 180 °, the phase difference is large as shown in FIG. Since there is a temporal difference from the 1-system comparison frequency signal S15 during the comparison operation, the 1-system N divided signal S14, which is a desired pulse, is divided into the 0-system VCO leak signal S9. Since the level is not recognized as a pulse to be divided with a low level with respect to the signal that has been circulated, no malfunction occurs, and even if the VCO control voltage is output and the 1-system VCO 16 is controlled in that state, there is no cause for phase noise degradation. As shown in FIG. 9, the 1-system local oscillation signal S11 can obtain a normal VCO output waveform.

  Therefore, only when it is determined that interference has occurred, the phase of the 0-system VCO frequency division frequency S5 and the 1-system VCO frequency division frequency S15 is set to 180 °, so the reference frequency signal S7 is used as a clock and the switch circuit at this timing. Turn switch 9 off for one clock. As a result, as shown in FIG. 4, the 0-system reference frequency signal S6 is turned off by the aforementioned 1 clock, and the 0-system R frequency divider 33 that detects the rising edge and performs the frequency dividing operation is used. The count for frequency division is shifted by one clock.

  Therefore, the phase of the 0-system comparison frequency signal S5 is shifted by one clock of the reference frequency signal. By repeating this, the phase of the 0-system VCO frequency division frequency S5 and the 1-system VCO frequency division frequency S15 becomes 180 °, and the 1-system phase comparator 42 does not affect the 0-system VCO frequency division frequency S5 as jitter. The phase noise degradation of the 1-system local oscillation signal S11 is eliminated.

[Effect]
The first effect is that, in the synthesizer part of the diversity receiver, even if the VCO output of the synthesizer part of one receiver sneak around to the synthesizer part of the other receiver, it is affected as jitter by the phase comparator. Therefore, it is possible to generate a local oscillation signal that does not cause phase noise degradation.

  The second effect is that each synthesizer part of the diversity receiver can use a device that cannot secure an isolation amount between the internal VCO part and the PLL part, such as a PLL module IC with a built-in VCO.

The above-described embodiment shows an example of a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention.
For example, in the above embodiment, the case of a wireless receiver that receives a WCDMA wireless signal has been described. However, the present invention is not limited to this, and a wireless signal of another method may be received. The present invention may be applied to a wireless transmitter or a wireless transceiver.
That is, the wireless transmitter may be configured as shown in FIG.
FIG. 10 is a block diagram showing an embodiment of a wireless transmitter according to the present invention.
10 differs from the radio receiver shown in FIG. 1 in that the 0-system receiver 3 and the 1-system transmitter 13 in FIG. 1 are replaced with the 0-system transmitter 103 and the 1-system transmitter 113, respectively. It is a point changed to.
That is, the wireless transmitter 100 shown in FIG. 1 is composed of two transmitters, a 0-system transmitter 102 and a 1-system transmission transmitter 112, in order to obtain diversity gain on the wireless receiver side. The transmitters 102 and 112 include a 0-system transmitting unit 103 and a 0-system synthesizer unit 105 for transmitting a 0-system desired wave, and a 1-system receiving unit 113 and a 1-system synthesizer unit 115 for transmitting a 1-system desired wave.

  The 0-system transmitter 103 uses the local oscillation signal from the 0-system synthesizer 105 to convert the desired wave frequency to an intermediate frequency. The 1-system transmitter 104 receives the 1-system transmitter 113 from the 1-system synthesizer 115. A 1-system modulator 114 that modulates a desired wave frequency to an intermediate frequency using a local oscillation signal is provided. A 0-system synthesizer unit 105 outputs a 0-system VCO 106, a 0-system loop filter 107, The 1-system synthesizer unit 115 includes a 1-system VCO 116, a 1-system loop filter 117, and a 1-system PLL IC 118 for outputting a 1-system local oscillation frequency. .

  The diversity transmitter 100 further includes a reference frequency signal oscillating unit 119 for supplying a reference frequency signal to each system receiver, and a 0 system reference frequency signal S106 from the reference frequency signal oscillating unit 119 for the 0 system transmitter 102. A 0-system comparison frequency signal S105 obtained by frequency-dividing the 0-system reference frequency signal S106 and the 1-system reference frequency signal S116 into the comparison frequency inside the 0-system PLL IC 108 and the 1-system PLL IC 118. A 0/1 phase comparison unit 110 that receives the 1-system comparison frequency signal S115 and performs comparison processing is provided.

  The 0-system synthesizer unit 105, the 1-system synthesizer unit 115, the 0/1 phase comparison unit 100, the switch circuit 109, and the reference signal oscillation unit 119 of the wireless transmitter 100 illustrated in FIG. The description is omitted because it is the same as the machine 1.

  Further, the wireless transceiver can be realized by combining the wireless receiver 1 shown in FIG. 1 and the wireless transmitter 100 shown in FIG. In this case, when the wireless receiver 1 and the wireless transmitter 100 use the same frequency, it is necessary to perform transmission and reception alternately, and two antennas may be shared. preferable. Although it is not necessary to alternately perform transmission and reception, when the radio receiver 1 and the radio transmitter 100 use different frequencies, four antennas are required.

  The present invention can be used for a mobile phone, a transceiver, a stereo component, and a transmitter.

It is an example of the block diagram of the diversity receiver mounted in the radio base station (not shown) for receiving the radio signal of the WCDMA system which is one Example of the radio receiver which concerns on this invention. It is an example of the block diagram of the synthesizer part used for the radio | wireless receiver which concerns on this invention. It is a figure which shows the phase difference of each PLL output clock at the time of interference in the radio | wireless receiver shown in FIG. It is a figure which shows the phase difference of each PLL output clock when a switch circuit is once operated at the time of interference in the radio receiver shown in FIG. It is a figure which shows the phase difference of each PLL output clock at the time of the non-interference in the radio | wireless receiver shown in FIG. FIG. 3 is an operation diagram of a phase comparator at the time of interference in the wireless receiver shown in FIG. 1. FIG. 3 is an operation diagram of a phase comparator when there is no interference in the wireless receiver shown in FIG. 1. It is a figure which shows the spectrum waveform at the time of interference in the radio | wireless receiver shown in FIG. It is a figure which shows the spectrum waveform at the time of non-interference in the radio | wireless receiver shown in FIG. It is a block diagram which shows one Example of the wireless transmitter which concerns on this invention. It is an example of the block diagram of the conventional radio | wireless receiver.

Explanation of symbols

1 Diversity receiver (wireless receiver)
2, 12 Receiver 3 0-system receiver 4, 14 Mixer 5 0-system synthesizer section 7, 17 Loop filter 8, 18 PLL IC
9 SW (Switch circuit)
10 0/1 phase comparator 19 Reference signal oscillator

Claims (9)

A transmission side 0 system synthesizer unit for supplying a local oscillation signal to a modulation circuit of a 0 system transmission unit in a diversity-configured radio transceiver, and a transmission side for supplying a local oscillation signal to a modulation circuit of a 1 system transmission unit in the radio transceiver A 1-system synthesizer section, a receiving-side 0-system synthesizer section that supplies a local oscillation signal to the mixer circuit of the 0-system receiver in the wireless transceiver, and a local oscillation signal to the mixer circuit of the 1-system receiver in the wireless transceiver A wireless transceiver including a receiving side 1-system synthesizer unit to supply,
A transmission-side reference signal oscillating unit for supplying a reference frequency signal to each system transmitter, and a transmission-side switch circuit for turning on and off the 0-system reference frequency signal from the transmission-side reference signal oscillating unit for the 0-system transmitter A 0-side comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into a comparison frequency and a 1-system comparison frequency signal, and a transmission-side 0/1 phase comparison unit that performs comparison processing;
A receiving-side reference signal oscillating unit for supplying a reference frequency signal to each system receiver, and a transmitting-side switch circuit for turning on and off the 0-system reference frequency signal from the receiving-side reference signal oscillating unit for the 0-system receiver A 0-side comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into a comparison frequency and a 1-system comparison frequency signal, and a receiving-side 0/1 phase comparison unit that performs comparison processing;
A wireless transceiver characterized by comprising: The transmission side 0-system synthesizer unit includes an R divider that divides a signal from the transmission side switch circuit, an N divider that divides a signal from a VCO, the N divider, and the R divider A phase comparator that compares the phase of the signal from the frequency divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO;
The transmission side 1-system synthesizer unit includes an R divider that divides a signal from the reference frequency oscillating unit, an N divider that divides a signal from a VCO, the N divider, and the R divider. A phase comparator that compares the phase of the signal from the frequency divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO;
The receiving-side 0-system synthesizer section includes an R divider that divides a signal from the receiving-side switch circuit, an N divider that divides a signal from a VCO, the N divider, and the R divider A phase comparator that compares the phase of the signal from the frequency divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO;
The receiving side 1-system synthesizer section includes an R divider that divides a signal from the reference frequency oscillating section, an N divider that divides a signal from a VCO, the N divider, and the R divider. 2. The radio transceiver according to claim 1, further comprising: a phase comparator that compares phases of signals from a frequency divider; and a loop filter that filters a signal from the phase comparator and inputs the filtered signal to the VCO. . A transmission side 0 system synthesizer unit for supplying a local oscillation signal to a modulation circuit of a 0 system transmission unit in a diversity-configured radio transmitter, and a transmission side for supplying a local oscillation signal to a modulation circuit of a 1 system transmission unit in the radio transmitter A wireless transmitter including a 1-system synthesizer unit,
A transmission-side reference signal oscillating unit for supplying a reference frequency signal to each system transmitter, and a transmission-side switch circuit for turning on and off the 0-system reference frequency signal from the transmission-side reference signal oscillating unit for the 0-system transmitter A 0-side comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into a comparison frequency and a 1-system comparison frequency signal, and a transmission-side 0/1 phase comparison unit that performs comparison processing;
A wireless transmitter characterized by comprising: The transmission side 0-system synthesizer unit includes an R divider that divides a signal from the transmission side switch circuit, an N divider that divides a signal from a VCO, the N divider, and the R divider A phase comparator that compares the phase of the signal from the frequency divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO;
The transmission side 1-system synthesizer unit includes an R divider that divides a signal from the reference frequency oscillating unit, an N divider that divides a signal from a VCO, the N divider, and the R divider. 4. The radio transmitter according to claim 3, further comprising: a phase comparator for comparing phases of signals from the frequency divider; and a loop filter for filtering a signal from the phase comparator and inputting the filtered signal to the VCO. . Receiving side 0-system synthesizer for supplying a local oscillation signal to a mixer circuit of a 0-system receiving unit in a diversity-configured radio receiver, and a receiving side for supplying a local oscillation signal to a mixer circuit of a 1-system receiving unit in the radio receiver A wireless receiver including a 1-system synthesizer unit;
A receiving-side reference signal oscillating unit for supplying a reference frequency signal to each system receiver, and a receiving-side switch circuit for turning on and off the 0-system reference frequency signal from the transmitting-side reference signal oscillating unit for the 0-system receiver A 0-side comparison frequency signal obtained by dividing the 0-system reference signal and the 1-system reference signal into a comparison frequency and a 1-system comparison frequency signal, and a receiving-side 0/1 phase comparison unit that performs comparison processing;
A wireless receiver comprising: The receiving-side 0-system synthesizer section includes an R divider that divides a signal from the receiving-side switch circuit, an N divider that divides a signal from a VCO, the N divider, and the R divider A phase comparator that compares the phase of the signal from the frequency divider, and a loop filter that filters the signal from the phase comparator and inputs it to the VCO;
The reception-side 1-synthesizer unit includes an R divider that divides a signal from the reference frequency oscillating unit, an N divider that divides a signal from a VCO, the N divider, and the R divider 6. The radio receiver according to claim 5, further comprising: a phase comparator for comparing phases of signals from the frequency divider; and a loop filter for filtering a signal from the phase comparator and inputting the filtered signal to the VCO. . A local oscillation signal is supplied to a modulation circuit of a 0-system transmission unit in a diversity-configured radio transceiver, a local oscillation signal is supplied to a modulation circuit of a 1-system transmission unit in the radio transceiver, and a 0-system reception in the radio transceiver A method of controlling a radio transceiver for supplying a local oscillation signal to a mixer circuit of a part and supplying a local oscillation signal to a mixer circuit of a 1-system receiver in the radio transceiver;
A reference frequency signal is supplied to the transmitter of each system, the 0 system reference frequency signal from the transmission side reference signal oscillation unit is turned on / off to the 0 system transmitter, and the 0 system reference signal and the 1 system reference signal are compared with each other. The 0-system comparison frequency signal and the 1-system comparison frequency signal that have been divided into
Supply the reference frequency signal to the receiver of each system, turn on / off the 0 system reference frequency signal from the receiving side reference signal oscillation unit to the 0 system receiver, and compare the 0 system reference signal and the 1 system reference signal with the comparison frequency A control method for a radio transceiver comprising: inputting a 0-system comparison frequency signal and a 1-system comparison frequency signal divided into two and performing comparison processing. A control method for a radio transmitter that supplies a local oscillation signal to a modulation circuit of a 0-system transmission unit in a diversity-configured radio transmitter and supplies a local oscillation signal to a modulation circuit of a 1-system transmission unit in the radio transmitter. ,
A reference frequency signal is supplied to the transmitter of each system, the 0 system reference frequency signal from the transmission side reference signal oscillation unit is turned on / off to the 0 system transmitter, and the 0 system reference signal and the 1 system reference signal are compared with each other. A control method for a radio transmitter, wherein a 0-system comparison frequency signal and a 1-system comparison frequency signal that have been frequency-divided are input and compared. A control method for a radio receiver that supplies a local oscillation signal to a mixer circuit of a 0-system receiver in a diversity-configured radio receiver and supplies a local oscillation signal to a mixer circuit of a 1-system receiver in the radio receiver. ,
Supply the reference frequency signal to the receiver of each system, turn on / off the 0 system reference frequency signal from the transmission side reference signal oscillation unit to the 0 system receiver, and compare the 0 system reference signal and the 1 system reference signal with the comparison frequency A control method for a radio receiver, comprising: inputting a 0-system comparison frequency signal and a 1-system comparison frequency signal that have been frequency-divided into and comparing the signals.

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